moons

For gradual composition models, the primordial energy budget can be greater, but models with an initial energy content material of additional than 20% nonetheless cannot reproduce the observed properties of Uranus. In some of these models convection is too vigorous and alterations the composition gradients, and in other individuals the composition gradient is insufficient to delay the cooling. In all the circumstances where the initial energy spending budget is assumed to be greater than 20% of the gravitational binding power, the inferred radius and/or luminosity are larger than the measured radius and luminosity at the age of Uranus. The initial...